Sky Optics 400G QSFP-DD XDR4 is upgraded long-distance version based on DR4 solution complying with 400GBASE-XDR4 specification. With optimized high-power 1310nm parallel EML array, it reaches 425Gbps bandwidth and extends single-mode transmission distance to 2km, supporting fan-out into 4×100G FR1.

Optimized optical and circuit design controls power consumption within 8W, ensuring reliable operation at 0℃-70℃. It supports full DDM real-time diagnosis and upgraded CMIS4.0 protocol, with higher output optical power to break the distance limit of conventional DR4 modules without increasing fiber deployment costs.

As an upgraded version of DR4, XDR4 fills the gap between 500m and 2km. It is ideal for cross-cabinet interconnection in AI computing rooms, campus long-distance IDC links and 100G-to-400G hybrid upgrades, enriching full-distance 400G networking options.